Pipe joint



w. c. PERROW 2,561,884

PPPPPPP NT T a k x WARREN Z PEP/90W This invention relates being inserted into the,

Patented July 24, 1951 was "rm; JOINT UNITED m Warren-C. Perromiltichnibndv 3 Application June is, 1946',':Ser ial'No.' 677,784 a i particularly to joints of the bell and spigot type used in pipe lines carrying liquids which are either free flowing or under low pressure, as, for

example, sewers.

The general object of the joint of this type prevents or minimizes leakage of liquids from or infiltration of liquids into such pipe lines, and which will efiectively exclude roots and/or sand.

To this end, I have devised a novel one piece, annularfpreformed, elastic gasket, to be used in place of the gaskets commonly employed heretofore, and made of braided or twisted fibrous material. I

In order that the understood, reference ing drawing, forming invention may be readily is had to the accompanyand in which:

(Fig. 1 is 'a longitudinal section through abell and spigot joint, with my improved gasket in "position, showing the "assembled;

Fig. 2 is a fragmentary rear elevation of a porparts as they appear when tion of my improved applied to the end gasket as it appears when of the spigot, andbefore spigot being shown in section substantially on the line 22, of Fig-3; and 1 r Fig. 3 is a fragmentary longitudinal section taken substantially on the line 3-3 of Fig. 2,

looking in the direction of the arrows.

Referring to the drawing in detail, there is illustrated in Fig. 1 a pipe joint comprising a bell A and spigot B, with my improved gasket inserted between them.

This gasket consists of natural or synthetic rubber, or other suitable elastic material, such body comprising a radially disposed inwardly directed flange l.

The gasket also comprises an axially extending flange 2 having an internal diameter adapted to snugly embrace the end of the spigot B as shown in Fig. 1.

A third flange 4 is the flange 2 and flares shown in dotted lines in Fig. 3.

Thus this part of the gasket is of generally V-shape in cross-section, the flanges 2 and 4 constituting the two legs of the V.

The outwardly flaring leg 4 is formed at its free edge with an inwardly directed annular radially compressible lip or member 5, shown in an annular body of disposed at an angle to outwardly therefrom, as in Fig. 1 and in full lines invention is to pro vide an eflicient and practical which part of this specification,

bell, a portion ofthe- I scams; (cr sta -i s? to pipe Joints, and more y 1 .form." anydesired ,material, this jidttg ,1 sfizi 'r igi and in full lines in Fig. 3.

Formed in h outer face of theradial flange l are one or more annular grooves 3, two such grooves being shown. 1

In some cases it is desirableto reinforce the gasket at; the side; which will be applied to the the circumference of the gasket.

.The,, method of using my improved gasket is I asfollows: ;'Ihe flange} is first fitted snugly oyer ,the end ofthe spigot. The ,Z, ,due toits elasticity maybe increased, if desirednbv applyin a cementing, material between grip of the flange theflangeand the surface of the spigot. The inner. surface or wall of the bell may be similarly coated with cementing material.

The spigot, carrying the gasket with its leg 4 flaring outwardlyand rearwardly as shown in dotted .lines in Fig. l, isthen inserted in the bell,

and this, resultfiuin such outwardly flaring leg .i a wardly, into the position F'ig. l, and in dotted lines, in Fig. 3. When thus shown in full lines in forced mwardly,.the,outer leg 4, tightly engaging the in de; of the bell, is brought into a position substantially parallel with but spaced from the innerleg l Because ,of the flexibility of the outer leg will closely contact the inner surface of the bell, notwithstanding the fact that, due to Warping in curing or burning, the outer surface of the pipe and inner surface of the bell may not be true concentric circles.

At the same time, the lip or annular member 5 is pressed inwardly until its free edge engages and abuts the outer periphery or cylindrical surface of the inner leg 2, as shown in full lines in Fig. 1.

The purpose of this lip 5 is two-fold: First, it serves to support and hold the edge of the outer leg firmly against the innerwall of the bell, and second, it provides a cover which encloses the annular space 1 between the two legs of the gasket and serves to retain in this space any filling material which it may be desired to use to assist in maintaining tight contact between the outer leg and the wall of the bell.

The compressible radial flange 1, when the parts are assembled in final position, is interposed between and in contact with the bottom wall a of the bell, and the end wall b of the spigot, to assist in forming a tight joint, and to permit the' bell, obviating 5 ointing material.

slight movement of the pipe sections due to expansion or settling. The purpose of the grooves 3 is to break up the capillary path which might otherwise be formed betweenthe bottom wall of the bell and face of the flange, and thus prevent leakage over such path. If desired, the groove or grooves may contain rings of dry cork, or a similar compressible material, that will further assist inv maintaining a tigharioinaby ,vi rtue ofjits expanding in the ipresence Kori-moisture. The inside diameter of the flange l is, of course,lthe same as that of the pipe, "so as to present an unbroken inner surface for free new of the liquid. With the form of gasket shown,-,the., apnular space between the gasket and end'of t ll'may e be filled with mortar or suitable-pipe 'ij ointioom-qa.

said outwardly flaring leg is forced inwardly by engagement with the wall of the bell.

positions. However, by making the legs} and 4,, longer, and, if necessary, modifying theoriginal angle between them, the gasket can be so constructed as to itself substantially n11 the space in the necessity for additional What I claim is: 1.1:In' a pipe "joint comprising; inner- {and outer -=pipe members of the bell-and spigot type --eenn- .-in'g between them an annular space, agas'ket of elastic material for sealing sa-idannular space,

shape, "having "two" legs wvithftej edges, *and --being :formed :with an annular *fiange' adapted to be interposed between the end of the s'filgdt and the bottom of the bell, one dfsa'id legs extending axially and constructed I to snuglyem- :brace the end of {the spigot,--and the other "leg being disposed at an angleto the firs't, and-mom mall-y flaring outwardly ther'etrom, said-outwardly flaring leg having-a maximum-diameter substantially: greater than the diameter of the inner surface of th'e" b'el1,' and' belng adaptedto engage and 'lie "in clo'seconta'ct with'the wall of "the'bell when inserted-therein and'td be thereby .ideform'ed, and forced inwardly} into aj-pos'ition :said gasket comprising-wholly of' g'ene railly vapproximately parallel *with' bu't spa'ced a substantial distance I V outwardly flaring leg havingatfit's free edge an inwardly projecting compressible lip disposedat acute angle thereto a'nd normally l yinginjfa plane substantially parallel wi'th 's'ai'd eannular flange, said lip structed 'toabut directly against the nuter p'e- :riphery of said axially extending firstaleg-f'when being unattached to fibula-"con- :posed at an angle to the first, ;-l 5.

2; In a pipe joint comprising inner and outer pipe members of the bell and spigot type defining between them an annular space, a gasket of elastic material for sealing said annular space, said gasket comprising a body ofgenerally V- shape, having two legs with free edges, and being r-med. withsan annular fla nge adapted to be terpose'd between the end, of: the spigot and the cm of the'bell, one of said legs extending and constructed to snugly embrace the end of the spigot, and the other leg being disand normally iilaring outwardly therefrom, said outwardly flaring'leghaving a maximum diameter substantially b6, axially grmter than=thediameter of the inner surface ofthe b ell, and being adapted to engage and lie in close contact with the wall of the bell when inserted therein and to he thereby deformed and $0 1 5 "ii wa dly into a sitio ."annrox y parallel'withfbutspaced a substantial @2118 f ai fi s ies; a d ne le vin at' free'ed'ge an'annular, elastic, compressible 1mber lying at an acute angle. thereto andp ojectn t wa the otherf eg, sai imember b n -un- "attached to but constructed toabut andjbe compres'sed directly a ainst Ithecylifrdririal surface 3 saifiiother e when said ioutwaniiy fiaring 513 s is forced inwardly "by engagement with the lwall of the bel1. 1"

V 'WARRE151v C.. PEB'ROW. I REFERENCES CITED The following references are ;of-;record -in ;the .flle of this patentt a 'UNITED STATES-PATENTS -Number Name a Date 126,624 Coffee sy 14,1872 1508333 Davis "Jan.,6, 914 4' 8{ h ,V-V-'--'--;- a; F -2 3. 93 2,219,289 "Bennett 'OQtQZQ Ill-9&0 2,239,725 Nathan V Eeb i, i941 2 ;274,-32 3 Fisher neb zg 'egz 122895133 Bennett ,Apr. 21,1 1'9'42 2,314,336 Brend y y l.; ar. 23, i943 "2,372,095 Leistensnide 'QMarfZO 195i? FOREIGN PATENTLS M -Nurnb'er Country Date ""Germany Mar. 27,1924 

